Ceiling fan



FIG. 1 is a top perspective view of a ceiling fan according to my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a side view thereof.

Portions of the ceiling fan shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a ceiling fan, as shown and described. 